The Aprilaire "Auto Trac" humidifier control is an automatic, non-digital humidification control for Aprilaire humidifiers. It is computer-equipped, completely automated and never needs manual adjustments. The humidistat measures the outdoor temperature and indoor humidity, and continually adjusts your home's indoor humidity to the optimal level.

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In 2002 Alpine Home Air Products became the first company to sell heating, air conditioning and indoor air-quality products online. We have proudly served hundreds of thousands of customers, helping them save time and money by buying their products direct.